Scheduler and also Main file to call server and scheduler

src/main/scala/fetch/FetchService.scala

@@ -48,6 +48,17 @@ object FetchService {
     }
   }
 
+  def fetchSingleFile(fileName: String): IO[(String, String)] = {
+    println("start fetching")
+    fetchFiles(List(fileName)).flatMap { results =>
+      results.headOption match {
+        case Some(Right(result)) => IO.pure(result)
+        case Some(Left(err)) => IO.raiseError(err)
+        case None => IO.raiseError(new Exception("No file fetched"))
+      }
+    }
+  }
+
   def fetchInRange(from: LocalDateTime, to: LocalDateTime): IO[List[Either[Throwable, (String, String)]]] = {
     val fileNames = FileNameService.generate(from, to)
     fetchFiles(fileNames)

src/main/scala/fetch/FileNameService.scala

@@ -1,7 +1,9 @@
 package fetch
 
+import cats.effect._
+
 import java.time.format.DateTimeFormatter
-import java.time.{Duration, LocalDate, LocalDateTime}
+import java.time.{Duration, LocalDate, LocalDateTime, ZoneId, ZonedDateTime}
 
 object FileNameService {
   private val interval = Duration.ofMinutes(30)
@@ -21,7 +23,18 @@ object FileNameService {
     time.plusMinutes(adjustment)
   }
 
-  // not sure either data are each 10 minutes or each 30 mins of hour
+  def generateCurrentHour(implicit clock: Clock[IO]): IO[String] = {
+    clock.realTime.map { duration =>
+      val instant = java.time.Instant.ofEpochMilli(duration.toMillis)
+      val zonedDateTime = ZonedDateTime.ofInstant(instant, ZoneId.of("Europe/Riga"))
+      val now = zonedDateTime.toLocalDateTime.withMinute(30)
+      val csvName = s"${formatter.format(now)}.csv"
+//      println("println", csvName)
+      csvName
+    }
+  }
+
+  // currently csv files are generated each 30 mins of hour
   def generate(startTime: LocalDateTime, endTime: LocalDateTime): List[String] = {
     val roundStartTime = roundToInterval(startTime, true)
     val roundEndTime = roundToInterval(endTime, false)